5. Conclusions
Researchers have stated that in order to achieve equity and
efficiency, motorists should be charged MR&R marginal cost
prices based on the axle weights of their vehicles raised to the
fourth power. However, this power is often inaccurate. Depending
on the definition of pavement deterioration, such as rutting, loss
of serviceability, roughness or cracking, the appropriate power
ranges from 3 to 6 or more.